An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-12-11T22:24:38

Updated: 2024-08-04T13:53:17.554Z

Reserved: 2020-08-07T00:00:00

Link: CVE-2020-17437

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2020-12-11T23:15:12.683

Modified: 2022-08-08T14:57:57.177

Link: CVE-2020-17437

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-12-09T00:00:00Z

Links: CVE-2020-17437 - Bugzilla